Is 10 BB/hour sustainable?

[Valuebettingtheriver]

My average over 100-150 hours of live play is approx. 10 BB/hr at 3/6. I was basically wondering if this is sustainable in the long run since most if not all the tables I play are filled with terrible weak passive players. Can I expect to make this rate over 20K hands, or will variance start rearing its ugly face? I haven't really gone on a lucky streak. A lot of the time I find my premium hands are being cracked, but I am patient. If I remain this way could I keep this up? It seems way too easy, so it cant be sustainable. What rate would be?